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Great Southern Bancorp, Inc. - Consolidated Statement of Stockholders Equity (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
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Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Common dividends declared (in dollars per share) | $ 0.72 | $ 0.72 | $ 0.72
CPP Preferred stock dividend rate | 0.0500 | 0.0500 | 0.0500
SBLF preferred stock dividend rate | 0.0340 |  |
Income tax expense on change in unrealized holding gain on available-for-sale securities | $ 4,411 | $ (3,919) | $ 6,266

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